HTML Entities 
&nbsp ; - non-breaking space 
&lt; - less than sign - <
&gt; - greater than sign - >
&amp; - ampersand - &
&quot; - double quote - "
&apos; - single quote - '
&copy; - copyright - ©
&trade; - trademark - ™
&bull; - bulletpoint - •
&euro; - Euro currency - €

Some characters are reserved for coding, or are not found on the keyboard. Entities provide a way to use those characters.

Entities HTML